Homework Practice

Printable assignment

Electric Current and Its Effects: Practice 1

Quick Concepts

Question 1mcq

Which set contains the basic parts needed for a simple working torch circuit?

A.Cell, bulb, switch and connecting wires

B.Cell, eraser, ruler and paper

C.Bulb, magnet, thread and soil

D.Switch, water, flower and stone

Question 2mcq

Why does a bulb not glow in an open circuit?

A.The bulb becomes heavier.

B.The path for electric current is broken.

C.The cell loses both terminals.

D.Current flows twice as fast.

Question 3mcq

A student connects only one terminal of a cell to a bulb. The bulb does not glow. What is missing?

A.A second bulb always

B.A magnet near the bulb

C.A complete path back to the other terminal of the cell

D.A glass rod touching the cell

Question 4mcq

What is the main reason scientists use standard circuit symbols?

A.They make batteries last forever.

B.They remove the need for wires.

C.They stop current from flowing.

D.They make circuit diagrams simple and understandable to everyone.

Question 5mcq

In a circuit diagram, a switch is shown open. What should you infer?

A.Current will not flow through that branch.

B.The current becomes stronger.

C.The cell changes into a magnet.

D.The bulb must glow brighter.

Apply and Check

Question 6mcq

A diagram shows two cells connected positive to negative in sequence. What is this combination called?

A.Fuse

B.Battery

C.Filament

D.Electromagnet only

Question 7mcq

Why does the filament of an electric bulb glow?

A.It absorbs water from air.

B.It changes into a permanent magnet only.

C.It becomes hot due to the heating effect of current.

D.It cools rapidly when current flows.

Question 8mcq

Which appliance mainly uses the heating effect of electric current?

A.Compass

B.Bicycle bell without electricity

C.Magnifying glass

D.Electric iron

Question 9mcq

Why are heating elements often made of materials like nichrome?

A.They can get hot without melting easily.

B.They dissolve quickly in water.

C.They are always perfect insulators.

D.They stop all resistance.

Question 10mcq

What is the role of a fuse in an electric circuit?

A.It increases current endlessly.

B.It melts and breaks the circuit when current is too high.

C.It stores water for the circuit.

D.It changes AC into sunlight.